3883998193921 has 4 divisors (see below), whose sum is σ = 3884043532500. Its totient is φ = 3883952855344.

The previous prime is 3883998193909. The next prime is 3883998193927. The reversal of 3883998193921 is 1293918993883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 736354488321 + 3147643705600 = 858111^2 + 1774160^2 .

It is a cyclic number.

It is not a de Polignac number, because 3883998193921 - 2⁹ = 3883998193409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3883998193927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22540546 + ... + 22712203.

It is an arithmetic number, because the mean of its divisors is an integer number (971010883125).

Almost surely, 2^{3883998193921} is an apocalyptic number.

It is an amenable number.

3883998193921 is a deficient number, since it is larger than the sum of its proper divisors (45338579).

3883998193921 is an equidigital number, since it uses as much as digits as its factorization.

3883998193921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45338578.

The product of its digits is 181398528, while the sum is 73.

The spelling of 3883998193921 in words is "three trillion, eight hundred eighty-three billion, nine hundred ninety-eight million, one hundred ninety-three thousand, nine hundred twenty-one".